LIWA

Control and Coordination

CBSE Class 10 · Science · Chapter 6

Past board exam questions

CBSE 2027 sample paper · 2 marks

Which parts of the brain perform certain actions for which we do not have any thinking control? What are such actions called, give two examples.

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These actions are controlled by the mid-brain and the hind-brain (the medulla in the hind-brain). Such actions are called involuntary actions. Examples (any two): blood pressure, salivation and vomiting.

CBSE 2027 sample paper · 3 marks

How do muscles move at the cellular level and respond when processed messages are received from the brain?

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• When a nerve impulse (a processed message from the brain) reaches the muscle, the muscle cells move by changing their shape so that they shorten. • Muscle cells have special proteins that change both their shape and their arrangement in the cell in response to these nervous electrical impulses. • When this happens, new arrangements of these proteins give the muscle cells a shorter form, and the muscle contracts, causing movement.

CBSE 2027 sample paper · 2 marks

How is the information of touch in the ‘sensitive plant' controlled and coordinated?

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The sensitive plant has no nervous tissue. When it is touched, the information is communicated from cell to cell by electrical-chemical means. To move, plant cells change shape by changing the amount of water in them, resulting in swelling or shrinking; this change of shape makes the leaves fold up and droop.

CBSE 2026 board paper · 1 mark

Identify the type of tropic movement that is responsible for the movement of the pollen tube towards an ovule from the following options.

  1. Hydrotropism
  2. Geotropism
  3. Chemotropism
  4. Phototropism
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Chemotropism

CBSE 2026 board paper · 1 mark

Identify the endocrine gland that regulates the growth of human body.

  1. Pituitary gland
  2. Thyroid gland
  3. Pancreas
  4. Adrenal gland
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Pituitary gland

CBSE 2026 sample paper · 1 mark

Which of the following is a correct combination of function and part of the brain?

  1. Posture and balance: Cerebrum
  2. Salivation: Medulla in midbrain
  3. Hunger: Pons in hindbrain
  4. Blood pressure: Medulla in hindbrain
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Blood pressure: Medulla in hindbrain

CBSE 2026 board paper · 1 mark

Walking in a straight line and riding a bicycle are activities which are possible due to coordination of which part of the brain ? (Part of the Brain) — (Name of the area of the Brain)

  1. Fore-Brain — Cerebrum
  2. Mid-Brain — Cerebellum
  3. Hind-Brain — Cerebellum
  4. Hind-Brain — Medulla
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Hind-Brain — Cerebellum

CBSE 2026 board paper · 1 mark

The growth of tendril in pea plant is due to which of the following ?

  1. Effect of chemotropism
  2. Effect of gravity
  3. Rapid growth of part of the tendril away from the point of contact with the support (object)
  4. Rapid growth of the part of the tendril in contact with the support (object)
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Rapid growth of part of the tendril away from the point of contact with the support (object)